Rotation and oscillation characteristics oflevitated droplet andin and outside flow fields

• Project/Area Number: 21560230
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Thermal engineering
• Research Institution: University of Fukui (2012); Japan Atomic Energy Agency (2009-2011)
• Principal Investigator: WATANABE Tadashi 福井大学, 附属国際原子力工学研究所, 特命教授 (50391355)
• Project Period (FY): 2009 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 浮遊液滴 / 回転 / 振動 / 表面張力 / 数値シミュレーション / 回転振動特性 / 振動圧力 / 表面流れ / ボルツマン方程式 / ナビエストークス方程式 / ナビエトークス方程式 / 定量的評価 / 音響場 / 圧力振動 / 周波数 / 振幅

Research Abstract

In order to study the characteristics of an oscillating-rotating droplet, which is the key point of levitation method for crystal processing and measurement of material properties, inside and outside flow fields of droplet have been simulated numerically. The accurate measurement of surface tension was found to be possible by an appropriate combination of oscillation amplitude and rotation. Radiating flows from the droplet surface, large steady vortices around the droplet, and thin flow layers on the droplet surface were also found.

Research Products

• [Journal Article] On the numerical approach for simulating reactor thermal hydraulics under seismic conditions (2012)
  • Author(s): Tadashi Watanabe
  • Journal Title: Annals of Nuclear Energy Volume: 49 Pages: 200-206
  • DOI: 10.1016/j.anucene.2012.07.005
  • Peer Reviewed
• [Journal Article] Numerical simulation of droplet motion and two-phase flow field in an oscillation container (2011)
  • Author(s): Tadashi Watanabe
  • Journal Title: Int. J. Multiphysics Volume: 5 Pages: 35-46
  • Peer Reviewed
• [Journal Article] Numerical simulation of liquid sloshing using arbitrary Lagrangian-Eulerian level set method (2011)
  • Author(s): Tadashi Watanabe
  • Journal Title: Int.J.Multiphysics Volume: 5-4 Issue: 4 Pages: 339-531
  • DOI: 10.1260/1750-9548.5.4.339
  • Peer Reviewed
• [Journal Article] Nonlinear oscillations and rotations of a liquid droplet (2010)
  • Author(s): Tadashi Watanabe
  • Journal Title: Int. J. Geology Volume: 1-4 Pages: 5-13
  • URL: http://www.naun.org/multimedia/NAUN/geology/20-062.pdf
  • Peer Reviewed
• [Journal Article] Nonlinear oscillations and rotations of a liquid droplet (2010)
  • Author(s): Tadashi Watanabe
  • Journal Title: Int.J.Geology Volume: 1 vol.4 Pages: 5-13
  • Peer Reviewed
• [Presentation] Numerical Simulation of the Oscillating Flow around a Droplet (2013)
  • Author(s): Tadashi Watanabe
  • Organizer: International Conference on Fluid Mechanics
  • Place of Presentation: ミラノ(イタリア)
  • Year and Date: 2013-01-09
• [Presentation] Numerical Simulation of the Oscillating Flow around a Droplet (2013)
  • Author(s): Tadashi Watanabe
  • Organizer: International Conference on Fluid Mechanics
  • Place of Presentation: ミラノ（イタリア）
• [Presentation] On the Numerical Approach for Simulating Thermal Hydraulics under Seismic Condition (2012)
  • Author(s): T.Watanabe
  • Organizer: Int.Conf.on Advances in Fluid Mechanics
  • Place of Presentation: フローレンス(イタリア)
  • Year and Date: 2012-02-28
• [Presentation] Numerical simulation of surface flows around a droplet in an oscillating pressure field (2011)
  • Author(s): T.Watanabe
  • Organizer: MULTIPHYSICS 2011
  • Place of Presentation: バルセロナ(スペイン)
  • Year and Date: 2011-12-15
• [Presentation] Numerical Simulation of Flow Field in and around a Droplet in an Acoustic Standing Wave (2011)
  • Author(s): T.Watanabe
  • Organizer: 9^<th> Int.Conf.on Fluid Mechanics and Aerodynamics
  • Place of Presentation: フローレンス(イタリア)
  • Year and Date: 2011-08-23
• [Presentation] Mass conservation of level set approach for nonlinear droplet dynamics (2011)
  • Author(s): T.Watanabe
  • Organizer: 6^<th> Int.Conf.on Continuum Mechanics
  • Place of Presentation: ケンブリッジ(英国)
  • Year and Date: 2011-02-25
• [Presentation] Simulation of liquid sloshing using arbitrary Lagrangian-Eulerian level set method (2010)
  • Author(s): T.Watanabe
  • Organizer: MULTIPHYSICS 2010
  • Place of Presentation: 熊本
  • Year and Date: 2010-12-09
• [Presentation] Simulation of two-phase flows with free surface in a tank using arbitrary Lagrangian-Eulerian and level set coupled method (2010)
  • Author(s): T.Watanabe
  • Organizer: 5^<th> European Conf.on Comp.Fluid Dynamics
  • Place of Presentation: リスボン(ポルトガル)
  • Year and Date: 2010-06-15
• [Presentation] Numerical simulation of droplet motion and two-phase flow field in an oscillating container (2009)
  • Author(s): Tadashi Watanabe
  • Organizer: Multiphysics 2009
  • Place of Presentation: リール大学(フランス)
  • Year and Date: 2009-12-11
• [Presentation] Accurate measurement of surface tension using a levitated liquid droplet (2009)
  • Author(s): Tadashi Watanabe
  • Organizer: Int. Conf. Electromagnetic Processing of Materials
  • Place of Presentation: ドレスデン(ドイツ)
  • Year and Date: 2009-10-22
• [Presentation] Accurate measurement of surface tension using a levitated liquid droplet (2009)
  • Author(s): Tadashi Watanabe
  • Organizer: Int.Conf. Electromagnetic Processing of Materials
  • Place of Presentation: ドレスデン国際会議場(ドイツ)
  • Year and Date: 2009-10-22
• [Presentation] 液滴の振動周波数へ及ぼす振幅と回転の影響 (2009)
  • Author(s): 渡辺正
  • Organizer: 日本機械学会2009年度年次大会
  • Place of Presentation: 岩手大学(盛岡市)
  • Year and Date: 2009-09-15
• [Patent(Industrial Property Rights)] 浮遊液滴を用いた材料の表面張力測定方法 (2009)
  • Inventor(s): 渡辺正
  • Industrial Property Rights Holder: 独立行政法人日本原子力研究開発機構
  • Industrial Property Number: 2009-124247
  • Filing Date: 2009-05-22